What would it take for the Hopkins trade to be worth it?

What I mean by this is, how many yards and TDS would the three players we got in place of Hopkins need to get?
My view is;

David Johnson – 1000 yrds, 8 TDS.
Brandon Cooks – 1000 yrds, 8 TDS. Randall Cobb – 800 yrds, 6 TDS.

*All purpose yards.

submitted by /u/jclive6
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